<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:epub="http://www.idpf.org/2007/ops"
    xmlns:ev="http://www.w3.org/2001/xml-events">
    <head>
        <title>Test</title>
        <epub:trigger ev:observer="pause" ev:event="click" action="pause" ref="test"/>
    </head>
    <body>
        <video id="test" src="birds.mp4" width="320" height="240" poster="test.jpg"/>
        <p>
            <span class="button" id="pause">Play/Pause</span>
            <span id="muted">MUTED</span>
        </p>
    </body>
</html>